Conventional wisdom tells us that people don’t go to the movies on Super Bowl weekend. Of course, that wisdom has been tested by the big debuts of Hannah Montana: The Best of Both Worlds, Taken and Dear John, in recent years. In 2013, Warm Bodies should become the latest title to buck Super Bowl convention. The teen-zombie romance earned an estimated $8.1 million from 3,009 locations on Friday, including $600,000 from its midnight premieres. That puts the film on track for a three-day total of $20 million instead of the low-to-mid teens that had been projected. Projections also failed to gauge the future of the frame’s second wide release: Bullet to the Head. The Sylvester Stallone action movie was expected to earn between $6 and $7 million this weekend - in the manner of Schwarzenegger’s recent The Last Stand. Instead, Bullet to the Head took in an estimated $1.7 million from 2,404 locations on Friday, placing its three-day prospects at just $4.6 million. We’ll have full details tomorrow.